We are a solo practice and our physician died suddenly this past Sunday. We are in the process of getting a locum tenum and am curious of how to bill that. So it is my understanding we cannot bill under our physician or group NPI as of Sunday. Also, if another cardiologist offers to come to our practice and see our patients until we get someone, how does that work? We just want to get our patients taken care of and not lose them in the process.